Head for barrels or churns



2 Sheets--Sheet 1.

(No Model.) Y

A J. MGDBRMAID. Head for Barrels 01 Churns. NQ. 232,997. f Patented oct. 5,1880.

` ur A w in lllli (No Model.) y n 2 Sheets-Sheet 2. J. MGDEPM/PAID.l Head for Barrels or Churns.

Ng. 232,997. Patented oct. 5, 1880.

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JOHN MCDERMAID, OF ROOKFORD, ILLINOIS.

` HEAD FORBARRELS OR CHURNS.

SPECIFICATION forming part of Letters Patent No. 232,997', dated October 5, 1880.

Application led July 31, 1880.

(No model.)

To all whom it may concern Be it known that I, J. MGDERMAID, of Roekford, in the county of Vinnebago and State of Illinois, have invented certain new and useful Improvements in Heads forBarrels or Ohurns; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in heads for barrels or churns; and it consists, essentially, in a head for barrels or churns consisting of an annular metal ringprovided with perforated ears or lugs, and adapted to be secured in a groove in the end of a barrel, in combination with a removable head consisting, essentially, of a disk formed of wood, paper, or equivalent material, and inserted in a skeleton metal frame, radially-slidin g bolts, and a rotary hub provided with two separate and independent spiral or cam grooves, in which engage the inner ends of the radiallysliding bolts, and by "which said bolts are aet uated simultaneously.

Myinventionfurther consists in certain other details of construction and combinations of parts, as will hereinafter be described and pointed out in the claims.

In the accompanying drawings, Figure l is a View, in perspective, of a barrel-churn provided with my invention. Fig. 2 is a vertical section of my improvement secured to the up per end of a barrel. Fig. 3 is a plan view of the head with the rotary hub removed therefrom, and Fig. et is a plan view of the under side ot the rotary hub, showing the separate and independent cam grooves formed in its lower surface.

A is an annular metallic ring, preferably galvanized to prevent its oxidation, the outer edge of the ring being beveled, as at a', to adapt it to snugly tit within the groove a2 in the end of the barrel, and be secured therein the same as an ordinary barrel'head. To secure the annular ring in place the hoops are removed from one end of the barrel to allow the staves to be sprung apart a sufficient dis tance to admit of the insertion of the outer and beveled edge of the ring in the groove a2. rIhe hoops are then driven on, thus securing the ring tightly in place.

The inner edge of the annular ring is constructed with a raised bead, d, for a purpose hereinafter described. The ring is also provided with any desired number of slotted or perforated ears or lugs, b, which extend upwardly from the ring.

The removable barrel-head is constructed as follows: B is a skeleton-frame, made of metal, and is formed with a depending flange, c, within which is inserted a disk, O, the lower face of which is provided with a rabbeted edge, forming an annular recess, a, between the head and flange, in which recess is inserted a packing ring or gasket, D, the latter being arranged to lit upon the bead d of the annular-ring A when the hea-d is secured in place, and thus form a perfectly-tight joint. The skeleton-frame B is also `furnished with an annular ring portion, e, which tits upon the upper surface of the disk O around its outer edge, and is secured thereto by means of screws a3 inserted through the lugs at, the latter extending inwardly toward the center of the disk O. Radial armsgm extend from the annular ring c to the central supporting-plate,j, the latter being furnished with a hollow or perforated stud, on.

Ihe several parts of the skeleton-frame-to wit, the flange c, annular ring` c, radial arms g, central supporting-plate, f, and hollow stud m-are all cast in a single piece, which construction obviates the employment of screws or other devices for securing the parts together when made in separate pieces, thereby insuring cheapness in the manufacture and attachment of these parts. This construction also insures certain other advantages, as will hereinafter be explained.

E are radiallysliding bolts, their outer ends being tapered or wed ge-shaped, while their inner ends are formed with lugs or projections h. Each one of said bolts E is placed upon and supported by one of the radial arms g of the skeleton-frame B, and is retained against displacement by the guideloops F, attached to the disk O, and guide-loops c, cast solid with the radial arms.

Gr is a rotary plate or disk, provided with a hub, fm, which is journaled upon the hollow stud mi, and is secured thereto by means of IOO the bolt H, which is inserted through the disk G,the screw-threaded stem of the bolt extending through the hollow stud and receiving a nut, n, upon its upper end. Disk or plate G is provided with arms p, by which it is rotated, and on its under side is furnished with two independent and separate cam or spiral grooves, s, each of which extends from the periphery of the disk or plate to its central portion. The lugs or project-ions on the ends of two of the radially-sliding bolts engage in one of said spiral grooves, and those of the other two bolts engage in the other spiral groove. By rotating the disk or plate G in one direction the bolts are retracted or drawn toward the-center of the disk, and by rotating the disk in the opposite direction the bolts are forced ontward simultaneously and engage in the perforated ears or lugs b of the annular ring A. The wedge-shaped ends ot' the bolts operate to force the removable head toward the ring, and thus force the gasket or packing D in snug contact with the bead d.

'Ihe disk C is provided with a peep-hole, t, covered with glass, to enable the contents of the churn to be inspected without removing the head. The radial arms of the skeletonframe constitute iirni and unyielding supports for the radiali y-slidin g bolts, thereby insuring their free operation under all circumstances. Without such supports or with detached supports the bolts are rendered difficult to opererate, oftentimes, by the warping ofthe wooden disk; but the skeleton-frame constitutes a light, strong, and substantial structure. By the employment of the rotary disk or plate with its independent spiral grooves I am enabled to secure a sharper pitch to the spiral grooves, and operate the bolts lnore quickly and with greater uniformity than is possible when a single spiral groove is employed for this purpose.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with an annular ring provided with perforated ears, said rin g adapted to be secured in a groove in the end ot' a barrel, of a removable head provided with four radially-sliding bolts, and a rotary disk furnished with two spiral grooves which start on opposite sides of said disk and extend to the opposite sides of its hollow hub, the inner ends of the sliding bolts being provided with lugs, two of which engage in each of said spiral grooves, substantially as set fort-h.

`#-2. The combination, with a disk of wood or equivalent material, of a skeleton metal frame having a depending iiange, radial arms, and hollow stud, cast in a single piece, radiallysliding bolts supported on said arms, and a rotary disk or plate journaled on said hollow stud, said disk being furnished with two independent spiral or cam grooves, with which engage the ends of the radially-sliding bolts, substantially as set forth.

3. The combination, with a disk of wood or equivalent material, of a skeleton metal frame having a hollow stud or journal castsolid therewith, radially-sliding bolts, a rotary disk furnished with two independent spiral or cam grooves, with which engage the inner ends of the radially-sliding bolts, and a bolt extending through the disk and hollow stud,and nut for securing the rotary disk against displacement, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 28th day of July, 1880.

JOHN MGDERMAID.

Vitnesses:

RICHARD UHANEY, J oHN TITUs. 

